Coupling.



No. 804,276. PATENTBD NOV. 14, 1905. J. & J. 0. TIMMS.

COUPLING.

APPLICATION FILED SEPT. 24. 1904.

3 SHEETS-SHEET l.

WITNESSES lNVE/VT R5 sfiw No. 804,276. PATENTED NOV. 14, 1905.

J. & J. 0. TIMMS.

COUPLING.

APPLICATION FILED SEPT. 24, 1904.

3 SHEETS-SHBET 2.

WITNESSES INVENTORS W O.

no. 804,276. PATBNTBD NOV. 14, 1905. J. & J. 0. TIMMS.

COUPLING.

UNITED STATES PATENT OFFICE.

COUPLING.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed September 24, 1904- Serial No, 225.797.

T at whom it may concern.-

Be it known that we,JAMEs Trims and JAMES O. TIMMS, residents ofColumbus, in the county of Franklin and State of Ohio, have inventedcertain new and useful Improvements in Couplings; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

Our invention relates to an improved coupling, the object of theinvention being to provide an improved construction of parts whichdispense with the employment of a pivot-pin to pivotally support theknuckle, thereby preventing the annoyance of bent knuckles at thepivot-pin and broken pivot-pins, as has been the case with couplings ofthis type heretofore known.

With this object in view the invention consists in certain novelfeatures of construction and combinations and arrangements of parts, aswill be more fully hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in horizontal section,showing the knuckle in locked position. Fig. 2 is a similar View showingthe knuckle open. Fig. 3 is a front view showing a portion of theknuckle-tail in the head. Fig. 4 is a view in horizontal section withknuckle and pin removed. Fig. 5 is a side view of the knuckle.

Fig. 6 is a perspective view showing the relative positions of theknuckle and locking-pin, and Fig. 7 is an enlarged view in cross-sectionof the locking-pin.

1 represents the draw-head of ordinary external shape, havingforwardly-protruding lugs 2 at one side, as shown. These lugs 2 are madewith recesses 3, having central curved portions or bearings 4 anddiverging shoulders 5 and 6 at opposite sides of bearings 4 and mergingthereinto, forming flaring enlarged entrances to said bearings.

7 represents the knuckle, having enlarged outer head with curved faces 8to contact with and turn freely against the curved outer faces of lugs2, and the main portion 9 of the knuckle is adapted to enter the openfront of the coupling-head. On the upper and lower faces of the knuckleadjacent to the curved faces 8 thereof integral lugs 10 are located andconnected with the outer head of the knuckle by integral webs 11, therear faces of which latter being flat or straight, while the front facesare of general compound curvature merging into the curvature of the lugs10. At top and bottom of the knuckle and curved concentrically withjournal-lugs 10 are heavy webs 12, adapted to move in curved grooves 13in the top and bottom of the drawhead.

By thus constructing our improvements the lugs 10 can be inserted intobearing-recesses 4 and the ends of webs 12 into grooves 13, and when theknuckle is swung into the head the webs 12 will prevent possibility ofthe knuckle being pulled out of the heacl until swung beyond itsordinary operative positions, and the knuckle is prevented from swingingthis far by the locking-pin, which will now be described.

The locking-pin 14 is approximately rectangular throughout the greaterportion of its length, and when in locked position such rectangularportion of the pin rests between a flat wall 15 of the head and the flatface 16 of the knuckle-tail 17, thus absolutely looking the knuckle inits closed position. The lower portion of the pin is recessed, as shownat 18, so that when the pin is raised the knuckle-tail can pass and bepermitted to open, such opening movementbeing, however, restricted by alug or enlargement 19 on the inner end of the knuckle-tail striking therectangular portion of the pin and limiting the opening movement of theknuckle.

Near the lower end of pin 14 a shoulder 20 is provided at one side, sothat when thepin is elevated and'tilted this shoulder 20 will rest on ashoulder 21 in the head and hold the pin in lock-set position, and theeye 22 at the upper end of the pin, with which the operatingchain isconnected, is located at one side of or at the center of the pin toinsure this tilting of the pin when elevated.

To insure the easy raising of the pin and limit such movement, across-pin 23 is passed through the upper pin-casing 24 of the head andthrough an elongated slot 25 in the pin. This slot 25 is of appreciablygreater width than the diameter of the pin, and a hollow roller 26 islocated in said slot and receives the pin. This roller 26 turns freelyon the pin and reduces the friction of the parts, holding thelocking-pin out of frictional contact with the walls of the pin-casing,and this is especially desirable when the draw-head of a coupling in usebreaks, the separation of the cars causing the pin to rise and uncoupleand prevent the locked couplings falling to the track, which would bethe case if the pin were permitted to bind in the head and not rise,owing to the excessive frictional contact due to the tangential pull ofparting cars.

The operation of our improvements is as 'follows: To open the knuckle,the pin 14 is raised to lock-set position, with shoulder 20 of the pinresting on the shoulder 21 in the head. The knuckle can then be swungopen, and in opening the enlargement 19 strikes the pin 1 L, forcing itsshoulder 20 from shoulder 21 and supporting the pin on the knuckle-tail,and when the knuckle is closed the pin will fall from the tail intolocked position.

By constructing our improvements as above explained it will be seen thatthe curved webs 12 in grooves 13 sustain the buffing and pulling strainon the knuckle, relieving the journal-lugs 10 thereof, the latter beingof sufiicient strength to sustain such blows as necessarily come thereonin ordinary use.

A great many changes might be made in the general form and arrangementof the parts described without departing from our invention, and hencewe do not restrict ourselves to the precise details set forth, butconsider ourselves at liberty to make such slight changes andalterations as fairly fall within the spirit and scope of our invention.

Having fully described our invention, what we claim as new, and desireto secure by Let ters Patent, is

1. The combination with a draw-head, of a knuckle therein, a locking-pinin said head having an enlarged slot therein parallel with thelongitudinal axis of said pin, a hollow roller in said slot, and a pinin the upper portion of said head passing through said hollow roller.

2. The combination with a draw-head having in its upper-and also in itslower wall, a recess, l and having divergent fac'es extending from saidrecesses, of a knuckle, lugs on the upper and lower faces of the knucklemounted to turn in said recess in the upper and lower walls of thedraw-head, webs connecting said lugs with the body of the knuckle andhaving faces to engage the said divergent faces on the draw-head.

In testimony whereof-we have signed this specification in the presenceof two subscrib- 1 Witnesses:

L. BENTON TUssINe, KATHARINE GoRooRAN.

